Update README.md

Author: ltrudu

README.md

@@ -116,7 +116,7 @@ Snippet code to use to retrieve the Serial Number of the device:
             @Override
             public void onDebugStatus(String message) {
                 // You can use this method to get verbose information
-                // about what's happening behing the curtain
+                // about what's happening behind the curtain
             }
         });
     }
@@ -151,7 +151,7 @@ Sample code if you need to get both device identifiers:
              @Override
              public void onDebugStatus(String message) {
                 // You can use this method to get verbose information
-                // about what's happening behing the curtain             
+                // about what's happening behind the curtain             
              }
          });
      }